Seeking Google reverse DNS delegation contact

[rfg at tristatelogic.com (Ronald F. Guilmette)]

Does anyone here happen to know who at Google I should be talking
to if I want to ask a question about their reverse DNS services?

I'd just like to ask someone there why anyone at Google thought
that it would be a Good Idea for Google to provide reverse DNS
services for the 204.8.136.0/21 IP address block, a block that
appears to be chock-full to the brim of snowshoe spamming domains.

http://pastebin.com/raw/VNwmgMHh
http://pastebin.com/raw/Hk3SKGvp


P.S. I gave up on the "evil" part some time ago.  Now, I'm willing to
settle for them just not being spammish.